$('.only_differences').on('click',function() {
        if ($('.params-values').length > 1) {
            for (var i = $('.params-names li').length; i >= 0; i--) {
                var a = [];
                $.each($('.params-values .param_'+i), function(b,v) {
                    a.push($(v).text());
                })

                var y = true;
                for (var n = a.length - 1; n >= 0; n-- ) {
                    if (a[n] != a[0]) {
                        y = false;
                        break;
                    }
                }

                if(y == true) $('.param_'+i).addClass('differences');
            };
        }
        return false;
    });